1 files changed, 55 insertions, 0 deletions
diff --git a/netwerk/test/unit/test_dns_disable_ipv4.js b/netwerk/test/unit/test_dns_disable_ipv4.js
new file mode 100644
index 0000000000..686bbf9b4a
--- /dev/null
+++ b/netwerk/test/unit/test_dns_disable_ipv4.js
@@ -0,0 +1,55 @@
+//
+// Tests that calling asyncResolve with the RESOLVE_DISABLE_IPV4 flag doesn't
+// return any IPv4 addresses.
+//
+
+"use strict";
+
+var dns = Cc["@mozilla.org/network/dns-service;1"].getService(Ci.nsIDNSService);
+var ioService = Cc["@mozilla.org/network/io-service;1"].getService(
+  Ci.nsIIOService
+);
+
+var listener = {
+  onLookupComplete(inRequest, inRecord, inStatus) {
+    if (inStatus != Cr.NS_OK) {
+      Assert.equal(inStatus, Cr.NS_ERROR_UNKNOWN_HOST);
+      do_test_finished();
+      return;
+    }
+
+    while (true) {
+      try {
+        inRecord.QueryInterface(Ci.nsIDNSAddrRecord);
+        var answer = inRecord.getNextAddrAsString();
+        // If there is an answer it should be an IPv6  address
+        dump(answer);
+        Assert.ok(answer.includes(":"));
+      } catch (e) {
+        break;
+      }
+    }
+    do_test_finished();
+  },
+};
+
+const defaultOriginAttributes = {};
+
+function run_test() {
+  do_test_pending();
+  try {
+    dns.asyncResolve(
+      "example.org",
+      Ci.nsIDNSService.RESOLVE_TYPE_DEFAULT,
+      Ci.nsIDNSService.RESOLVE_DISABLE_IPV4,
+      null, // resolverInfo
+      listener,
+      null,
+      defaultOriginAttributes
+    );
+  } catch (e) {
+    dump(e);
+    Assert.ok(false);
+    do_test_finished();
+  }
+}